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Water is the source of life, and water is the basis for the growth of all plants. Water, on the other hand, has an even greater impact on agriculture. The good weather, the bumpy harvest of the grain, the lack of income and income in the water, and the fact that the income is less and less is due to fertilizer. These verbs are familiar to farmers, and we can also understand the important impact of water on agriculture. The moisture of crops mainly comes from soil moisture, and the soil moisture has a special relationship with atmospheric precipitation. Soil moisture mainly comes from atmospheric precipitation, groundwater and irrigation, and soil moisture accounts for the largest proportion. Therefore, when we are irrigating or researching crop yields, we all need to determine the content of soil moisture. In the agricultural field, we usually use the soil moisture analyzer to measure, and the wireless public opinion and drought management system is sometimes referred to as wireless public opinion monitoring. system.
How much the atmospheric precipitation seeps into the soil depends on the amount of precipitation, the intensity and nature of the precipitation. The amount of atmospheric precipitation can be measured by a self-reporting rain gauge. In general, the amount of precipitation is large and there may be more water in the soil. Precipitation or intermittent precipitation with high intensity may easily cause ground loss, so there is less moisture infiltrating into the soil; and continuous rainfall with low intensity is beneficial to the absorption and storage of moisture by the soil. Soils with different textures and structures have different seepage and storage properties. The sand is coarse and loose, and it has good water permeability, but it is poor in water storage. The clay is compact and has strong water storage, but the water permeability is poor. The loamy soil with suitable sand and stickiness not only seeps water, but also stores water. In places where the slope is large and where the vegetation coverage is relatively thin, the absorption of precipitation by the soil is relatively small; where the soil is covered with flatness and vegetation is dense, the soil absorbs more precipitation. It can be seen that the absorption of soil moisture is affected by various aspects, and is related to the texture of the soil and the amount of rainfall. The relationship between soil moisture and weather conditions is expressed by the air humidity near the ground floor. The lower the air humidity near the ground floor, the faster the water evaporates. Just as the ground temperature is very high in the summer, the humidity near the ground floor is very small, so the soil moisture evaporates quickly. If the southwesterly wind is again encountered, the loss of soil moisture is even more intensified.
Controlling the demand of crops for water can greatly increase the growth cycle and yield of crops and increase agricultural efficiency. Timely and moderate rainfall will undoubtedly benefit the normal growth and development of crops, and it will also help reduce agricultural investment and strive for high yields and quality. Therefore, irrigation technologies developed in recent years, such as sprinkler irrigation and drip irrigation, are also used to better and more timely irrigate agricultural crops. Because in the natural conditions, atmospheric precipitation is always uneven, often there is insufficient or excess soil moisture. How to increase the utilization of soil moisture can reflect the progress of agricultural modernization to some extent.
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